Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 947 [Rate centres in NPA 947] [Dial plan for NPA 947]

NXX: 333

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
947-333 A Lake Orion MI SFLDMITODS2  543C ONVOY, LLCV - MI 340      
947-333 0 Lake Orion MI   543C ONVOY, LLCV - MI 340   2016-05-10   
947-333 1 Lake Orion MI   543C ONVOY, LLCV - MI 340   2016-05-10   
947-333 2 Lake Orion MI   543C ONVOY, LLCV - MI 340   2016-05-10   
947-333 3 Lake Orion MI   543C ONVOY, LLCV - MI 340   2015-11-23   
947-333 4 Lake Orion MI   991E BANDWIDTH.COM CLEC, LLC - MI 340   2016-08-21   
947-333 5 Lake Orion MI   933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 340   2018-08-31   
947-333 6 Lake Orion MI   5562 METROPCS, INC. 340   2018-10-15   
947-333 7 Lake Orion MI   5562 METROPCS, INC. 340   2018-10-15   
947-333 8 Lake Orion MI   543C ONVOY, LLCV - MI 340   2016-02-01   
947-333 9 Lake Orion MI   933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 340   2015-12-10   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.